Key facts at a glance
| Retatrutide sizes | 10, 15, 20, 30, 40, 60 mg |
|---|---|
| Price | $124.99 (10 mg) · $240 (30 mg) · $400 (60 mg) |
| Third-party testing | Lot shown; COA not viewable |
| Ships from | USA (business address Newport Beach, CA) |
| Shipping | Rates at checkout · free over $300 |
| Payment methods | Visa, Mastercard, Amex, Discover, ACH/wire, crypto |
| Guarantee / refunds | All sales final; damaged/wrong items replaced |
| Best for | Buyers who need large or unusual vial sizes and can verify testing directly with the vendor |
Pros and cons
- Compound clearly identified with LY3437943 and CAS number
- Six vial sizes up to 60 mg
- Phone (949) 739-5700, email and a street address
- Card payments accepted
- No retatrutide COA was viewable; the COA library showed 0 public certificates
- High price at 10 mg ($12.50/mg)
- Claims to operate "since 2019", but the domain was registered in May 2026
- Also sells oral retatrutide strips, pre-mixed vials and insulin syringes, which point to human use
Bottom line
PX1 Research labels its product clearly and offers a wide range of sizes (10–60 mg). We could not see a certificate of analysis, which is the most important check for this compound. The company’s history claims also don’t match its domain age.
Products and pricing
“PX13-R” is identified on the page as LY3437943, CAS 2381089-83-2, a 39-amino-acid GLP-1/GIP/glucagon triple agonist. Prices: 10 mg $124.99 ($12.50/mg), 15 mg $139.99, 20 mg $200, 30 mg $240 ($8/mg), 40 mg $300 and 60 mg $400 ($6.67/mg). The site also sells a pre-reconstituted 18 mg “Black Label” version ($400), retatrutide dissolving strips ($300) and insulin syringes. The catalog lists more than 100 items.
Testing
The product page shows lot PX13R-10-3363 and a “99.5% purity” badge, and it says a lot-linked COA covers HPLC, LC-MS and endotoxin. When we checked, the site’s COA library read “0 public certificates across 0 compounds”. The lab that tested retatrutide is not named on the page; the site only refers to an ISO/IEC 17025 independent lab in general terms.
Shipping and payment
The product page promises same-day dispatch before 2 pm ET. The shipping policy says orders go out within 24–48 business hours after payment. Rates appear at checkout, and shipping is free over $300. The site does not ship to New York, Massachusetts or Connecticut. Accepted payments are Visa, Mastercard, American Express and Discover, plus ACH/wire and cryptocurrency.
Policies and support
All sales are final. Damaged or wrong items reported within 72 hours with photos are replaced. For packages lost in transit, the company opens a carrier investigation. Support is by phone (949) 739-5700 (weekdays) and email, at 3857 Birch St, Newport Beach, CA 92660.
Reputation
The domain was registered on May 29, 2026, although the site says the company has operated “since 2019”. Trustpilot shows a 3.8 TrustScore from only 2 reviews, and Trustpilot notes the company has not recently invited reviews. The site’s code also serves peptidexplorations.com, a wholesale-only manufacturer that lists the same phone number. We found no FDA warning letter or Eli Lilly lawsuit naming PX1 Research.
Alternatives to PX1 Research
Every vendor is assessed against the same criteria, explained on How We Rate. Vendors change prices and policies often — confirm details on the vendor's site before ordering. Retatrutide is an investigational compound and is not FDA-approved; see our medical disclaimer.